Three people were sent to hospital on Boxing Day after they were found unresponsive in a vehicle that crashed in Abbotsford. They were believed to be suffering from carbon-monoxide poisoning. (Kevin MacDonald photo)

B.C. mom, kid recover at home after carbon monoxide poisoning in car

Other child still in hospital after trio found unresponsive in Abbotsford on Boxing Day

Bird said the vehicle came to rest against a guard rail after the mom pulled over.

The woman, in her mid-20s, and her two kids – ages 3 and 5 – were overcome by carbon monoxide poisoning and discovered by two passersby.

CO poisoning is most often caused by a vehicle left running in an enclosed area, said Abbotsford Assistant Fire Chief Craig Bird. But it can also be the result of exhaust fumes leaking into the passenger compartment of a vehicle.

Judy Bird said an inspection of the vehicle will have to be conducted to find the source of the leak.